Transcript for Vice President Joe Biden Meets With National Rifle Association

The white house ready to take action on gun violence. 27 days after the shooting in newtown, connecticut. Vice president biden squared off with the powerful nra today, getting ready for a big announcement next week. Abc's chief white house correspondent jonathan karl now tells us what happened. Reporter: On the day vice president biden met with the national rifle association, he made it clear he's pushing for the biggest expansion of gun control in two decades. There's got to be some common ground here. Reporter: Biden's proposal will likely include mandatory background checks on virtually every gun sale, and a ban on semi-automatic weapons and those ammo clips that hold dozens of bullets. That will pit him squarely against the nra. Everything that's been proposed impinges on people who have every right to own firearms. Reporter: The nra has long been a lobbying force like no other. Its unwavering opposition to gun control immortalized by its late president, charlton heston. From my cold, dead hands! Reporter: They even managed to expand gun rights during president obama's first term, leafizing guns in national parks and on amtrak. The nra has lots of money, $3 million on campaign contributions and lobbying last year alone. How powerful is the nra? Remember, they give grades to members of congress. And how many got an a with sticking with them and opposing all gun control? 288 members, the overwhelming majority of congress. It's enough to intimidate democrats, too. Just listen to joe biden in 2008. Barack obama ain't taking my shotgun, so, don't buy that. Reporter: Recent polls suggest an opening for some gun control. A majority now favoring a ban on semiautomatic handguns. But it would be a mistake to think the nra's influence has waned. In the three weeks after the shooting, in newtown, connecticut, they added more than 100,000 new members.

This transcript has been automatically generated and may not be 100% accurate.

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